Circular Motion - Physics 101 / AP Physics 1 Review with Dianna Cowern
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- Опубліковано 28 вер 2024
- Lesson 7 (Circular Motion) of Dianna's Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need an AP Physics 1 review before the exam? This course is for you!
Exercises in this video:
Problem1: You have a one kilogram ball on a two meter long string. You swing it in a circle so it goes around once every two seconds. What’s the tension in the string?
Problem 2: What is the magnitude of the centripetal force keeping the Earth moving in its orbit around the Sun?
Problem 3: The coefficient of friction between tires and the road is about 1.0. At what angle should we bank our road if the average speed of cars driving on the road is 80 km/hr? (Don’t forget to convert to m/s!)
Thank you to Derek Muller from Veritasium for his incredibly kind shout out at the end of the video, and for encouraging people to pursue physics! And thanks to Lizzie Armanto for letting me use her footage!
Credits:
Dianna Cowern - Executive Producer/Host/Writer
Jeff Brock - Lead Writer/Course Designer
Laura Chernikoff - Producer
Victoria C. Page - Video Editor
Sophia Chen - Researcher/Writer
Erika K. Carlson - Researcher/Writer
Hope Butner - Production Assistant
Levi Butner - Videographer
Lauren Ivy - Set Design
Vanessa Hill - Consulting Producer
Aleeza McCant - Illustrator
Rachel Allen - Illustrator
Consultant - Kyle Kitzmiller
Lucy Brock, Samantha Ward - Curriculum Consultants
Cathy Cowern - Transcription
Velodrome Photo: flic.kr/p/cSkSDQ
Fritz Zwicky Portrait: www.zwicky-stif...
I literally (and I don't exaggerate) can't find a better teacher!! Many Edutubers are AMAZING teachers; you should collaborate and create material for school curriculum that's both educative and engaging
Like Vsauce, veritausium, kurkegzat etc.
Literally they teach me more than school. If I were to choose being thought in school vs taught by one of these people I would choose UA-cam.
These are the ones I have in mind: 3Blue1Brown, Ben Eater, CGP Grey, SmarterEveryDay, Physics Girl, Steve Mould, VSauce, minutephysics, Tom Scott, Veritasium and Crash Course
@@eccentricOrange
Also don't forget Professor Dave Explains, Patrick JMT, Fermilab, Dr Physics A, PBS Spacetime, Doc Schuster, Professor Leonard, and MIT OpenCourseWare.
@@eccentricOrange also Arvin Ash
These are good cicerone , but you guys should try to think more by yourself (give more time to think) so that it makes you great 👍
Queen of physics - UA-cam’s physics girl
Sabine Hossenfelder is Queen, physics girl is the princess.
Argue the toss if you want but go watch her physics videos.
@@seriousthree6071 i've watched few videos of both, though rating a person or their knowledge or channel is wrong, i say that the ranking of a teacher(any one who makes other's learn) not only depends upon how much knowledge they have and how much they are conveying without wasting time but also on how effective their lectures are
@@grandunification6226 there are many potential ways of comparing UA-cam channel presenters. Not everyone will use the same standards. Even if they are then they may be biased.
@@seriousthree6071 that's why no one should rate a person ☺😊😊😊
ua-cam.com/video/fvGNI52gkBE/v-deo.html
Dianna + Skateboarding = Peak UA-cam
Diana Boarding
She looks like a skate border.
@@Bassotronics she surfs & snowboard
@ *D L*
I knew it!
@@apexscape so what you saying is she only needs the last one to complete the trifecta
The force IS strong in this one. Watch she does not join the dark (matter) side.
But I would like if she did it.
_For my ally is gravity, and a powerful ally it is. Planets creates it, makes them grow. Its energy surrounds us and binds us together. You must feel gravity around you; here, between you, me, the tree, the rock, everywhere, yes. Even between the land and the ship._
It’s hip to be square. 🤣
My friends think that I am a genius when they come over and I’m watching your channel.
Dianna is the best. Hoping we see much more from her.
This is 2 years after you published this. I hope you are getting better. You have a spark for life and teaching and I really like your presentations.
This has saved my physics grade singlehandedly.
First thoughts about the motion of going in a circle and speeding up made me think of Furze's large donut where he rode around on the wall.
Then you talk about bent space and I remembered that Veritasium did his video on that a few days ago.
Great how all of UA-cam relates back to itself. :)
Even my native language is not english i got max. Of the teaching which i dont understand from my native teachers.Loved so much . Love from India❤️. Thx mam.
I really enjoy and learn much from your explanation
Please never stop making such awesome videos.
Physics is all so exciting when we have teachers like you.
I'm in 10th grade and it is helping me very much tho. Very grateful. And same with materials that I learn at school.
Dianna you are the best, I love all of your videos they're very productive!
Thank you for making this amazing work!
I love it!!!💚 🌎🇲🇽
Mam please cover entire mechanics,thermodynamics,shm,waves, electricity and magnetism and modern physics. This is the syllabus for jee mains and only you can make it very easy 😊. Love from India 💙💙💙
i took centripetal forces last year and i just understood it now :"D
please keep making these videos they help me a lot! ^_^
The Larry Niven series of Ringworld books are amazing. He writes awesome scifi with real physics in them. Not only that but he was 1 of the consultants for Ronnie Rayguns SDI (Star Wars) program.
This channel is amazing!
May the force be with you
is there anyway you could make these faster lol theyre so helpful! im a freshman in college right now and these are saving my physics grade so much... but were a little bit ahead of where your last video is!! i swear i would pay to have access to your future videos earlier to help me in this class!!
Tried tested and true enough, good basic knowledge for practical Physics.
super like ., your work was very good. congratulations.
I love your new background! Very prettyy! I usually watch you every week but i guess i havent been getting notified.. dang bell!
Anyways, thank you for all you do i love your videos and knowledge. Keep doing you girl!
Peace&Love&Light to you all! ☮☯️🕉
Literally, my crush 😻
Thanks to you and the team for this❤️❤️
Hello Physics Girl Dianna. Like your vids however, I have a question for you and I realize I am changing gears on you:
Compare Mars and Earth:
Average Global Temp of Mars is -87F.
95% CO2 in Mars atmosphere and 1% Water Vapor.
Average Global Temp of Earth is 59F.
.04% CO2 in Earth's atmosphere and 4% Water Vapor.
Mars atmosphere is about 1% that of Earth.
Mars gets about 60% of the solar heat flux compared to Earth in watts/meter squared.
The CO2 concentration is about 2,400 times that of Earth, while water vapor is 0.25 times that of Earth.
Earth's atmospheric pressure is about 167 times that of Mars.
Normalizing CO2 and Water Vapor in the Mars atmosphere using the pressure factor gives
for CO2: 2,400 / 167 =14.3 and for Water Vapor: 25 / 167 =.0015
Taking the 60% factor for the solar radiant heat flux gives: 8.6 for CO2 and .009 for Water Vapor.
If my assumptions are are not too far fetched, the relative heat trapping effectiveness for Mars' when directly compared to Earth shows that Mars has 8.6 times the CO2 heat trapping ability of Earth, but only .0015 times the Water Vapor heat trapping ability. The conclusion drawn is that CO2 is insignificant for trapping atmospheric heat radiated from the surface. However, Water Vapor is extremely important for trapping atmospheric heat radiated from the surface.
BTW, if CO2 is so important why am I heating for 9 months for the last 2 years whereas 10 years ago I only had to heat for 7 months.
Great explanation Dianna as usual. Best wishes, always.
Ring world is not stable - but a Dyson sphere, NOW you've got something stable and possibly workable (assuming you can get all that material in one place, can sync it in the stellar orbit of the star you're building it around, can compensate for objects hitting it from inside and outside...); /turns page to channel Real Engineering...
Another great lesson. Thank you, Diana
Ok, now I won't be able to get that song out of my head for a while! :-) You have done the vomit comet but have you ridden a centrifuge? Like a jet fighter one, not carnival ride.
0:35 - Lizzie Armanto accidentally denied Tony Hawk's hug LOL damnnnnn. Tony gracefully turned it into an over the head clap though.
Your handwriting is very neat.
I am a high school student and I am very confused in an argument ,people says that when we generate any disturbance{wave} in a string, suppose that I have generated a simple harmonic wave on string in which all particles are performing Simple harmonic motion, suppose the wave is travelling and it just disturbs the particle which was initially at rest, people says that it disturbs the particle by exerting some kind of force on it , but how can there be any net force on the mean position?
why no one talks about how these disturbances are propagated from one particle to another dynamically{in terms of forces}. I think if we talk by what mechanism, these disturbances are generated it would become much more complicated for us{high school students}, so we all talk of waves only mathematically.
@3:13 that t-shirt yo! #firsttry #brailleskateboarding #youtubepros crossover must happen now!
Nice catch Dianna.
For the rest: May the Force be with you. Live long and prosper. 👍
I'm not a physics student. I'm only watching because it is so fun
7:15 centrifugal force
Dianna: explains all these physics concepts
Me: Gets distracted by the Jupiter globe on her desk
Dianna = cool circular motion!
this feeds right into my “why aren’t we flung off earth if it’s spinning so fast?” question... which i think every time i’m on the graviton which IS the best ride, so what mass would something have to be to meet the velocity and radius to escape earth? .... except gravity....
The centrifugal pseudo-force applied to us or any mass on earth is just a tiny, tiny fraction of the force due to gravity (which can also be cast as a pseudo-force in many theories, including general relativity).
A Very educational physics speech, thanks 💯
Yes that is speed with the balance gravity
Physics Girl!!! You have a incredible mind. Tell us about your DMT shroom trips!!!!
This is really great. Could anyone please tell me where to check my answers though?
These are so great!
if i pass physics, its thanks to you
Note that is a poorly designed loop, the radii are distributed incorrectly.
You can watch this video on the physics of rolling motion: ua-cam.com/video/MXaMW66i7s4/v-deo.html
Explained with graphs.
at 6:59, when you went from 'velocity' to 'acceleration', the wheels came off. is the implication that, for a mass to REACH velocity-x, That much energy/force is required??? is that newtons. or Newton-meters; in a circular (scalar) domain. please respond. googletranslate
@9:53 Alinity Flashback
If you can't hear your tires, you're not going fast enough on the on-ramp!
Centripetal force=mv2/r
Gravitational force is going down
if mass could matter ('scuse pun), then a straight line would depend upon mass, and therefore weight.
Thanks to this science and math, I just scored 2 mil in Tony Hawk Remake in the Warehouse.
Now I want to learn general relativity so bad ... you're so good at this
YES! This is the comment of my dreams. Thank you, I can die now.
@@physicsgirl Please don't!!!
What is the doubt?
@@physicsgirl if u die how will u make the video
You were like many of my best students. They love the complicated hard stuff! Relativity and Quantum p
Physics are always fun because they really require us to stretch our brains beyond our everyday experience.
I also do sections on acoustics and light and colors, many of the Liberal Arts students really love these sections.
Just know to you Diana. You do an excellent job! Physics Girl rocks!
A whole lot of this goes over my head, but I really do enjoy these videos. Thanks for the education =]
I'm glad you included the derivation of mv^2/r. I wonder if there's an intuitive way to explain it to those who don't know calculus.
Here you go,
ua-cam.com/video/NH1_sO8QY3o/v-deo.html
This is Khan Academy video where Salman Khan explains and derives the formula for Centripetal Acceleration just by intuition, this is the excellent explaination, you will really learn a lot from this video,
@ what do you mean?
All that math has my head spinning, for sure.
Ohhhhhhhhh circular motion.
omggg i was literally learning this at school today, thank you so much
@7:34 A CORRECTION IS NEEDED. YOU do not feel the centrifugal force when you are in the spinning ride. YOU feel the centripetal force of the wall pushing you toward the center, which is the ACTION FORCE. The wall of the ride feels the centrifugal force from you, which is the REACTION force. I'm willing to throw down over it. Come at me bro!!!! Seriously though, she did state that incorrectly.
Diana's version of "you spin me round" 😛 and spinning 🐄 s
I learn more physics here than my whole life in school...thank you Diana for doing this for us physics lovers❤️
A great fan and your regular student from India 🌟👍.
Please suggest me the best book of physics for kinematics and kinetics form basic level to advance.. I basically want a good conceptual book..
Fantastic video! I only wish I could understand it! You make physics simple, and yet at the same time you remind me why I dropped out of physics in high school. At 47 yrs old, I've missed my opportunity to be a scientist, but I feel, based on your videos, that if I had a tutor with your knowledge at the time, my education and subsequent career would have been vastly different from what it is today. Your videos are very inspiring and I hope that millions of young people are watching and using the knowledge that you impart to further enhance their lives. You are doing a great service to your fellow humans. Be proud of that and continue on inspiring young scientists. I know this probably flies in the face of everything you believe, but I thank God that you exist and you are helping to spread knowledge and understanding to a new generation. Sincerely.
When the x^ looks like a wizard's hat.
Me: "did you save the playlist?", Dumbledore asked calmly...
"Today in intro to physics, we're doing megastructures."
Coolest physics teacher :D
ua-cam.com/video/fvGNI52gkBE/v-deo.html
Dianna you should really watch (or read) the expanse if you want to see what the future could look like! They have a spaceship that imitates 0.3 earths gravity by spinning a big drum in the middle and every spaceship does a "flip and burn" to get some resemblance of gravity! It's awesome
Or also the 'Gundam' anime series has had those for around 40-50 years. The video game 'Halo' too uses a giant spinning ring with a habitat within. :)
You should post the skateboard trick as the thumbnail because so many ppl will be interested in this! so good
Thanks for such content and ending sir veritasium said awesome lovo from India
Radius is not specified in 3rd problem. Isn't it enough or not?
I love Physics and Veritasium and now Physics girl
I wish they had these kind of videos explaining physics back in 1998...
HALO
0:26 I thought it was Dianna herself attempting the loop of death lol
Lol same 😂
ua-cam.com/video/fvGNI52gkBE/v-deo.html
I love your videos, but I got a little lost today... 😶
Interesting nonetheless 😁 ❤️
I like the way of the explanations, but it goes a bit fast for me.
:v
@@fakexzvo9479 well thats one way of putting it i guess.
papa flammy is here again.
@@fakexzvo9479 damn chill lmao he has just as much a right to comment as you do.
Flammable mathematical equations for Time and energy ❓❓❓
Rewire all the physics for Time parameter of the Universe 🕉🕉🕉🕉we found kaal chakra changes challenge🕉🕉🕉
Ok, now you sound like "physics girl", nice going!
Great content, but please stop changing the zoom level of the video every 1.5 seconds to trick our brains into paying attention because of the change in visuals.
I appreciate you addressing the "oh so controversial" centrifugal force. Like many, it was taught to me as just fictitious but yes... things are not so straightforward.
Imagine physics girl is your science teacher 😉☺️
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAAHAHAHAHAHAHAHAHAHAHA.. TELL ME IN THE COMMENTS ABOUT IF YOU GUYS SPOT THE MISTAKE.
Thanks for these videos! I'm currently taking Physics this year, and I love the math and sciences, so I really appreciate this series.
"Thank you physics" -- love it. Well done (information, well edited, well presented, easily digested).
Isnt it centripetal acceleration resulting in a centrifugal force?
I'm probable the only one complaining about this, but that focus...
Came for the cuteness stayed for the physics
Physics 101 (introduction)
13:40 "If you get this wrong, I've failed" Maybe it was a joke. But yes that's the attitude of a good teacher. I met many teachers blaming their students all the time if they failed subjects and never looked or considered if their way is teaching is the problem!!!
Nice shout out for Ringworld. 👍👍
Awesome series BTW. Your presentation is the style I wish everyone could experience in formal school. It's makes what could be a dry, boring subject interesting.
I remember my first physics lessons. On TV (remember that archaic device?) with Prof. Julius Sumner Miller.
To me, a geek, it was the most interesting part of a little Canadian TV show (now with a huge cult following) called The Hilarious House of Frightenstein (starring, among a couple of others, Billy Van and Vincent Price).
Does any of this relate to blending a cake mix?
You, dear miss, are exquisitely, wonderfully, objectively awesome. Thank you for helping to create, and being the face of, such amazing content. You give me hope for future generations, and hope you continue to teach for many years to come. Thank you. Thank you. Thank you.
Please fix the focus on these. The last two in particular have had blurry Dianna and tack-sharp backgrounds. For most of these shots, the focus doesn't need to change, so you can just manually focus on Dianna, and avoid letting autofocus pick the wrong target.
Great stuff. And THANK YOU SO MUCH for such an understanding and approachable presentation of what centrifugal force is in a physics classroom. (I am campaigning for physics teachers to stop saying, "There is no centrifugal force." You explained it exactly the right way.)
Madam,I have a question that you can only answer to it ...please madam, in space, to push a ball of 200grams with 100 newtons for one meter...I have to push the ball for 0.063 seconds with 100 newtons,for producing work of 100 joules..... but for an truck of 50 tones,I have to push for 32 seconds with 100 newtons to push it one meter, to gain same amount of energy as ball gained. I surely have lost more energy on pushing truck(32 seconds of 100 newtons) than on pushing the ball (0.063 seconds of 100 newtons) BUT BOTH BALL AND TRUCK HAS THE SAME CHANGE IN KINETIC ENERGY....HERE LAW OF CONSERVATION OF ENERGY BREAKS....please explain this madam....
Hey Diana, I have a question:
at 16:45 you've correctly written FnCos(theta) = Fg..............(i, say)
isn't it also true that FgCos(theta)= Fn ........ (ii) ??
then , equating (i) and (ii) we would get a weird equation:
FgCos^2(theta)= Fg,
or, (theta)=0
WHICH IS WEIRD!!
Then how can you explain theta always being zero in this scenario....PLEASE Do reply.
You're doing a great job. Keep up the good work👌👍
One of the things that turned me off of physics in high school were all the formulae for force. Chap 1, Pg 1, "What is Force". "Force is mass times acceleration." F=ma. But then F=(mv^2)/r, F= -kx, F=(Gm1m2)/r^2, ... Every time I turned around, there was a new formula for F. I have since reconciled myself to what's going on, (Thank you Prof. Goodstein and the Mechanical Universe) but perhaps you can make a video of why there are so many.
Love your videos I am from India
2045 hrs at ist on Monday 24th July 2023// 30th week of year 2023//
,, Came Looking For A Tree Crocodile Also Known As 555s..